Loading ...
Sorry, an error occurred while loading the content.

Why Is The Ground Brown

Expand Messages
  • Pat Neuman
    Why Is The Ground Brown by Staff Writers Irvine CA (SPX) Apr 03, 2006 Ecologists have long asked, Why is the world green? In other words, why aren t
    Message 1 of 2 , Apr 3, 2006
    • 0 Attachment
      Why Is The Ground Brown

      by Staff Writers
      Irvine CA (SPX) Apr 03, 2006

      Ecologists have long asked, Why is the world green? In other words,
      why aren't herbivores, such as insects and grazing animals, more
      successful at eating the world's green leaves, also known as plant
      biomass?

      In the May 2006 issue of American Naturalist, Steven D. Allison
      (University of California, Irvine) asks the same questions a different
      way: Why is the ground brown? Why don't the organisms that break down
      the carbon in the soil consume it all?

      Some of the same ecological factors make the world green and the
      ground brown, especially the carbon in plant material, the role of
      herbivores and decomposer organisms in consuming that carbon, and the
      role of predators in eating the consumers of the carbon. As it turns
      out, as Allison observes, "the chemical structure of soil carbon makes
      it far more difficult to consume than plant carbon."

      There is about three times as much carbon in soil than in plant
      biomass. In addition, minerals in the soil can block decomposers from
      feeding on soil carbon. Allison also points out that most decomposers
      are of relatively small size compared to the animals eating green leaves.

      "Instead of digesting material in their guts, decomposers depend on
      enzymes to partially digest their food sources outside their bodies,"
      Allison explains. "This strategy is a major constraint on the
      breakdown of soil carbon that helps make the ground brown."

      Founded in 1867, The American Naturalist is one of the world's most
      renowned, peer-reviewed publications in ecology, evolution, and
      population and integrative biology research. AN emphasizes
      sophisticated methodologies and innovative theoretical syntheses--all
      in an effort to advance the knowledge of organic evolution and other
      broad biological principles.

      Steven D. Allison "Brown ground: a soil carbon analog for the green
      world hypothesis," The American Naturalist 167:5.

      Related Links
      University of California, Irvine
      University of Chicago Press Journals
    • Pat Neuman
      http://www.terradaily.com/reports/Why_Is_The_Ground_Brown.html ... leaves.
      Message 2 of 2 , Apr 3, 2006
      • 0 Attachment
        http://www.terradaily.com/reports/Why_Is_The_Ground_Brown.html

        >
        > Why Is The Ground Brown
        >
        > by Staff Writers
        > Irvine CA (SPX) Apr 03, 2006
        >
        > Ecologists have long asked, Why is the world green? In other words,
        > why aren't herbivores, such as insects and grazing animals, more
        > successful at eating the world's green leaves, also known as plant
        > biomass?
        >
        > In the May 2006 issue of American Naturalist, Steven D. Allison
        > (University of California, Irvine) asks the same questions a different
        > way: Why is the ground brown? Why don't the organisms that break down
        > the carbon in the soil consume it all?
        >
        > Some of the same ecological factors make the world green and the
        > ground brown, especially the carbon in plant material, the role of
        > herbivores and decomposer organisms in consuming that carbon, and the
        > role of predators in eating the consumers of the carbon. As it turns
        > out, as Allison observes, "the chemical structure of soil carbon makes
        > it far more difficult to consume than plant carbon."
        >
        > There is about three times as much carbon in soil than in plant
        > biomass. In addition, minerals in the soil can block decomposers from
        > feeding on soil carbon. Allison also points out that most decomposers
        > are of relatively small size compared to the animals eating green
        leaves.
        >
        > "Instead of digesting material in their guts, decomposers depend on
        > enzymes to partially digest their food sources outside their bodies,"
        > Allison explains. "This strategy is a major constraint on the
        > breakdown of soil carbon that helps make the ground brown."
        >
        > Founded in 1867, The American Naturalist is one of the world's most
        > renowned, peer-reviewed publications in ecology, evolution, and
        > population and integrative biology research. AN emphasizes
        > sophisticated methodologies and innovative theoretical syntheses--all
        > in an effort to advance the knowledge of organic evolution and other
        > broad biological principles.
        >
        > Steven D. Allison "Brown ground: a soil carbon analog for the green
        > world hypothesis," The American Naturalist 167:5.
        >
        > Related Links
        > University of California, Irvine
        > University of Chicago Press Journals
        >
      Your message has been successfully submitted and would be delivered to recipients shortly.